At http://ftp.winehq.org/pub/wine/Wine.xo is an activity that runs Windows software, based on the open source Wine project. It's easy enough to set up that, when it works, it requires no explanation, and it's not horribly broken anymore.

There are, of course, limitations on what an XO can run and on what Wine can run. Some Windows software needs tweaking before it will work.

The XO does not have opengl installed by default. This needs to be installed before Wine's directx or opengl can function.